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Maintenance

760A / 760D / 760N

4–17

REAR

A1 Power Supply board retaining screws

A3 Main board retaining screws

ÉÉÉÉÉÉÉÉÉ

FRONT

J2 J4

Ground strap

Figure 4–4: Retaining screw locations

5. To remove the board, slide it toward the rear panel until the potentiometer

shafts clear the front and then lift it out.

6. To replace the Main board, lay the board flat and slide it back into place

(there are grooves in the front molding for the board to slide into). Perform

steps 1 through 4 above in reverse order.

1. Remove the plug from J4 on the Power Supply board (the connection to the

Main board).

2. Remove the anode connection from the CRT and discharge it to ground.

WARNING. The CRT may retain a dangerous charge. Ground the conductor of

the anode to discharge the CRT. Do not allow the conductor to touch your body

or any circuitry.

3. Remove the plugs from J1 and J3 (the CRT wires). Remove the plug from

J2 (the power switch).

4. Remove the two screws from the rear panel that hold the AC line filter in

place.

5. Using a #1 Pozidrive tip, disconnect the power ON/OFF switch from the

Front Panel assembly.

6. Remove the seven screws that are holding the board down. See Figure 4–4.

Power Supply Board

Removal and

Replacement

Tektronix 760A User Manual

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